• Title/Summary/Keyword: Inlay

Search Result 193, Processing Time 0.028 seconds

A Study on Design of RF/UHF RFID Tag Antenna Using One-Sheet Inlay Pattern (One-Sheet Inlay 패턴을 이용한 RF/UHF RFID 태그 안테나 설계에 관한 연구)

  • Hwang, Gi-Hyun
    • Journal of the Korea Institute of Information and Communication Engineering
    • /
    • v.14 no.8
    • /
    • pp.1943-1949
    • /
    • 2010
  • In this paper, we developed a RFID tag antenna using one-sheet inlay pattern which consist of two different frequencies in one layer. The antenna in one-sheet inlay RFID tag does not use different kind RFID antennas in a card but implement 13.56MHz and 900MHz RFID tag antennas in one sheet. In order to evaluate the usability of proposed method, we configured test equipments and designed 6 different patterns and test the recognition distance of each pattern. Among the one-sheet inlay RFID tag antenna designs, the pattern no.5 has good performance with recognition distance of 5.34m at 900MHz and 3.5m at 13.56MHz.

A study on Thermal expansion of Inlay waxes (Inlay wax의 열팽창에 관한 연구)

  • Nam, Sang-Yong;Kwak, Dong-Ju;Cha, Sung-Soo
    • Journal of Technologic Dentistry
    • /
    • v.30 no.2
    • /
    • pp.17-22
    • /
    • 2008
  • The purpose of this study was to observe the thermal expansion of the inlay waxes at temperature. Inlay pattern wax shows not only a high coefficient of expansion but also a tendency to warp or distort when allowed to stand unrestrained. The thermal expansion of inlay waxes was tested according to the treatment conditions for 10 minutes at $40^{\circ}C$ The thermal expansion of inlay waxes at various temperatures was measured with an electro dial gauge. The results were as fellows: 1. It is shown that the rate of thermal expansion of wax A is 0.2%, wax B is 0.29%, wax C is 0.38%, and wax D is 0.22% at $40^{\circ}C$ 2. It is shown that the coefficient of thermal expansion of wax A is $106{\times}10^{-6}/^{\circ}C$, wax B is $152{\times}10^{-6}/^{\circ}C$, wax C is $199{\times}10^{-6}/^{\circ}C$, and wax D is $116{\times}10^{-6}/^{\circ}C$ at $40^{\circ}C$ 3. The thermal expansion of the inlay waxes at $40^{\circ}C$ was shown to increase in the order of wax C, B, D, A.

  • PDF

Comparison of Asphalt Concrete Inlay and Overlay for Rehabilitation of Aged Cement Concrete Pavement through Accelerated Pavement Testing and Life-Cycle Cost Analysis (포장가속시험 및 경제성 분석을 통한 절삭 덧씌우기와 비절삭 덧씌우기의 비교)

  • Suh, Young Chan;Kwon, Hong Jun;Lee, Eung Jun
    • International Journal of Highway Engineering
    • /
    • v.19 no.6
    • /
    • pp.75-81
    • /
    • 2017
  • PURPOSES : So far, aged cement concrete pavement on express highways has been rehabilitated mainly with asphalt concrete inlay. However, potholes were the major problem, and they shortened the life of the inlay mainly owing to the poor drainage of water once it infiltrated the interface of the concrete and asphalt. The purpose of this study is to compare the performance and economic efficiency of asphalt overlay and inlay. METHODS : Overlay and inlay were compared through accelerated pavement testing, and a life-cycle cost analysis was conducted in this study using the CA4PRS program. RESULTS and CONCLUSIONS : It was found from accelerated pavement testing that the overlay exhibited reflective crack resistance that was more than twice as effective as that of inlay. The total cost (construction cost + user cost) within the analysis period (20 years) of the overlay was 37% lower than that of the inlay.

SEMIDIRECT RESIN INLAY RESTORATION OF POSTERIOR TEETH (반직접법 레진 인레이를 이용한 구치부의 수복)

  • Han, Mi-Ran;Kim, Jong-Soo;Kim, Yong-Kee
    • Journal of the korean academy of Pediatric Dentistry
    • /
    • v.26 no.3
    • /
    • pp.479-485
    • /
    • 1999
  • Materials for posterior teeth includes amalgam, gold inlay and composite resin inlay. Amalgam and gold inlay have unsatisfyine esthetics. And because they simply obturate the cavity preparation, they do not strengthen the remaining tooth structure. Posterior composite resin has become established in recent years. However, its polymerization shrinkage and insufficient wear resistance were the most undesirable characteristic. The physical and mechanical properties of the composite resin inlay are further improved through heat treatment in an oven. The major part of polymerization contraction of the resin inlay takes place be fore cementation, and possible gap formation is only due to shrinkage of the thin layer of resin cement. With the semidirect technique, the inlay material is placed directly in the prepared tooth, and the primary polymerization is made by light activation with a handhold curing unit. Additional curing may take place extraorally with use of different curing ovens. It provides the patient with the benefits of luted restorations without the procedure of indirect lab-made inlay. I report three successfully treated cases by semidirect resin inlay technique. Entire clinical steps are described in detail with some discussions on the outcome.

  • PDF

IN VITRO STUDY ON MARGINAL LEAKAGE OF COMPOSITE RESIN INLAY RESTORATIONS (광중합 복합레진 INLAY 수복물의 변연누출에 관한 실험적 연구)

  • Yoo, Je-Kug;Bae, Jeong-Sik;Lee, Ho-Yong
    • The Journal of Korean Academy of Prosthodontics
    • /
    • v.26 no.1
    • /
    • pp.85-98
    • /
    • 1988
  • The primary aim of this study was to access the degree of marginal leakage in composite resin inlay restorations. Class V cavities were prepared on sixty extracted premolars. They were classified as control group and experimental group 1, 2 and each group was filled with BIS-FIL $I^{(R)}$ and $Silux^{(R)}$ composite resins. In the control group, the composite resin was inserted directly, the experimental group 2 was inserted as composite resin inlay after heat treatment on $125^{\circ}C$, 10 minutes. Then thermocycling was performed 1000 times. After staining with 1% Basic Fuchsin, they were cut in Buccolingual direction and the degree of penetration of the dye was examined under L/M. The following results were obtained : 1. In occlusal margin area, difference in marginal leakage was not observed in all groups. 2. In gingival margin area, cavities filled with composite resin inlay was less marginal leakage than filled directly in BIS-FIL $I^{(R)}$ group, and statistical significant difference was not existed in $Silux^{(R)}$ group. 3. The statistical significance was not existed between composite resin inlay and composite resin inlay heated secondarily. 4. In all groups, gingival margin area reveals more marginal leakage than occlusal margin area and statistical significance was existed.

  • PDF

A Study on Development of Inlay Made from Dyed-Gathered Wood (염색집성목을 이용한 목상감 재료의 개발에 관한 연구)

  • Kim, Dong Kooi
    • Journal of the Korea Furniture Society
    • /
    • v.26 no.3
    • /
    • pp.207-221
    • /
    • 2015
  • Inlay is a high technique of inlaying patterns on the surface of crafts and widely used transcending time and place at various hand crafting area. Inscribed pattern technique using rare materials in the area have been used by the artisans of artistic flair and functionality and its value is also highly regarded from ancient to modern and inherits and is being developed today. Existing inlay technique, however, has not been spread out because it needs craftsman's skill based on the handcraft and inscribed materials are very rare to use. This paper aims to replace natural wood Sanggam materials for traditional furniture patterns such as Samho Jang, Ohho Jang, Seongtoenoe Moon, Gyeopgwinoe Moon and wood inlay text like Soo (Long life), Bok (Luck), Kang (Peace), Ryoung (Relaxed) and gammadion cross pattern. Gathered black, yellow and white color dyed wood using power tools can replace rare natural inlay materials through reliable and standardized supply. Dyed-gathered inlay materials can easily replace wood inlay materials, therefore, attempt to create an improved direction regarding materials and fabrication techniques in order to make traditional or contemporary artistic furniture to be produced.

Issues in Ancient Metal Wire Inlay: A Case Study of Relics from Baekje (고대 금속 선상감 기법의 쟁점과 그 해석 - 백제 선상감 자료를 중심으로 -)

  • Choi, Gieun
    • Conservation Science in Museum
    • /
    • v.20
    • /
    • pp.13-30
    • /
    • 2018
  • Ancient metal objects with inlaid designs were mainly decorated using the wire inlay technique in which "V"- or "U"-shaped grooves were cut in a metal object and then filled with gold or silver. Previous studies on ancient metal objects featuring wire inlay generally attempted to ascertain the inlay techniques applied by examining photomicroscopes acquired during conservation treatment. However, they had limitations when examining wire inlay technique to the minute details. Wire inlay technique can be better investigated by enlarging X-ray films of relics using stereoscopic microscopy under transmitted light. The core processes of the wire inlay technique involve cutting grooves using a chisel and creating the inlay wires, but researchers hold varying opinions about the two processes. This study analyzed the entirety of the materials able to shed light on the main processes applied in Baekje wire inlay by examining X-ray films of relics through stereoscopic microscopy. This exhaustive research revealed that two types of techniques were used for wire inlay during the Baekje period. One is a plastic process of engraving dotted lines using a chisel and is found mostly in objects from the Cheonan and Gongju areas. The other is a cutting process that incises fine lines and was used mostly in relics from the Osan, Seosan, and Wanju areas. It is likely that the Baekje wire inlay techniques feature regional differences because the respective techniques were used or introduced by different groups of people.

Joined in the government-owned handicraft industry during the Joseon Dynasty Job type and role (조선시대 관영수공업에서 입사장(入絲匠)의 직무 유형과 역할)

  • KIM, Serine
    • Korean Journal of Heritage: History & Science
    • /
    • v.54 no.2
    • /
    • pp.216-239
    • /
    • 2021
  • Inlay (入絲), a poetic technique of digging grooves in the surface of crafts and decorating them with metal materials, was used throughout the royal daily routines, ceremonies and government officials of the Joseon Dynasty. The government-owned handicraft industry in the Joseon Dynasty was composed of craftsmen belonging to central and local government offices and was operated mainly by government-owned craftsmen. The inlay craftsman was transferred to the central government office and was in charge of inlay poetry for crafts. The current records of Korean inlay craftsmen are concentrated in the state-owned handicraft industry. In the state-owned handicraft industry, the government offices of inlay craftsmen can be divided into Kongjo (工造), Sangeuiwon (尙衣院), and the military. Here the election of a temporary government office for airspace is added. The government offices and military inlay craftsmen who use inlay crafts are assigned, and the inlay craftsmen are placed separately in the temporary office where the fine division of labor is developed. It can be made by utilizing craftsmen. The operation of these production systems was indispensable in pre-modern Korean society, where crafts had to be produced by hand. In this paper, we investigated the roles and job types of craftsmen in the state-owned handicraft industry during the Joseon Dynasty, focusing on inlay craftsmen. Although the details applied to the characteristics and materials of the field, labor supply and demand, etc. are different, Korea pursued crafts for various purposes through craftsmanship within the framework of the basic state-owned handicraft policy . The institutional equipment for implementation was almost common. We believe that adding and analyzing some literature records and relics will help us to study the crafts of the Joseon era in more detail.

A STUDY ON THE TENSILE BOND STRENGTH OF COMPOSITE RESIN INLAYS ACCORDING TO THEIR INTERNAL SURFACE TREATMENT AND TYPES OF LUTING CEMENT (복합레진 인레이의 내면처리와 합착용 시멘트의 종류에 따른 인장접합강도에 관한 연구)

  • Kim, Jin-Cheol;Cho, Young-Gon;Hwang, Ho-Keel
    • Restorative Dentistry and Endodontics
    • /
    • v.18 no.1
    • /
    • pp.103-113
    • /
    • 1993
  • The purpose of this study was to evaluate the tensile bond strength of composite resin inlays according to the their internal surface treatment and types of luting cement and compared them with the conventional direct resin filling thchnique. Class II cavities were prepared in 50 extracted human molar teeth, and then equally divided into five groups. Group 1 : Cavities of control group were directly filled with P-50. Group 2 : Cavities of resin inlay group were luted with resin cement. Group 3 : Cavities of resin inlay group were luted with luting G-I cement. Group 4 : Cavities of resin inlay group were luted with resin cement after sandblasting. Group 5 : Cavities of resin inlay group were luted with luting G-I cement after sandblasting. All specimens were polished with same method and stored in normal saline for 24 hours before testing. An Universal Testing machine(Model No. AGS-100A, Shimadzu, Japan) was used to apply tensile loads in the vertical direction, and the force required for separation was recorded with a cross-head speed of 5mm/min and 100kg in full scale. The results were as follows : 1. The mean tensile bond strength was lowest in group luted with luting G-I cement, with measurements of $14.45{\pm}0.78(kg/cm^2)$ and highest in group luted with resin cement after sandblasting, with measurements of $49.6{\pm}2.74(kg/cm^2)$. 2. The tensile bond strength was greater in resin inlay groups luted with resin cement than in control group and resin inlay groups luted with luting G-I cement(P<0.05). 3. The tensile bond strength was lower in resin inlay groups luted with luting G-I cement than in control group(P<0.05). 4. The tensile bond strength was greater in resin inlay groups luted with resin cement or luting G-I cement after sandblasting than without that(P<0.05).

  • PDF

An Archaeochemical Microstructural Study on Koryo Inlaid Celadon

  • Ham, Seung-Wook;Shim, Il-wun;Lee, Young-Eun;Kang, Ji-Yoon;Koh, Kyong-Shin
    • Bulletin of the Korean Chemical Society
    • /
    • v.23 no.11
    • /
    • pp.1531-1540
    • /
    • 2002
  • With the invention of the inlaying technique for celadon in the latter half of the 12th century, the Koryo potters reached a new height of artistic and scientific achievement in ceramics chemical technology. Inlaid celadon shards, collected in 1991 during the surface investigation of Kangjin kilns found on the southwestern shore of South Korea, were imbedded in epoxy resin and polished for cross-section examination. Backscattered electron images were taken with an electron microprobe equipped with an energy dispersive spectrometer. The spectrometer was also used to determine the composition of micro-areas. Porcelain stone, weathered rock of quartz, mica, and feldspar composition were found to be the raw material for the body and important components in the glaze and white inlay. The close similarity between glaze and black inlay in the microstructure suggests that the glaze material was modified by adding clay with high iron content, such as biotite, for use as black inlay. The deep soft translucent quality of celadon glaze is brought about by its microstructure of bubbles, remnant and devitrified minerals, and the schlieren effect.